Insulating-covering



I. S. CARROL| INSULATING COVERING.- armcmou'mm mus. um.

I ,3 1 7, 957 Patented Oct. 7, 1919.

l jiveri/i'or John cudder Carroll UNITED STATES PATENT OFFICE.

JOHN S. CARROLL, OF YONKERS, N. Y., ASSIGNOR TO H. W. JOHNS-MANVILLE 00., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

INSULATING-COVERING.

Specification of Letters .Patent.

Patented Oct. '7, 1919.

Application filed April 28, 1919. Serial No. 292,224.

To all whom it may concern:

Be it known that 1, JOHN S. CARROLL, a citizen of the United States of America, and resident of Yonkers, in the county of Westchester and State of New York, have invented new and useful Improvements in Insulating-Coverings, of which the following is'a specification.

This invention relates to Waterproof sectional pipe covering of the heat-insulation ty e adapted for use either on bare or on ot erwise covered heating or refrigeratin pipes, or pipes containing hot or cold flui to prevent transfer of heat between the con tents of the pipe and the atmosphere. The device is also adapted for use over plastic coverings, whether or not the plastic cover ing is made in place or applied in sections.

rincipal objects of the invention are to provide a sectional covering which can be applied without loss of time and which will supplement the existing covering by the provision of a space packed with a radiationpreventing air-containing material which when installed is a elatively impervious and continuous, and. ich is in turn covered by a waterproof exterior coverin In the accompanying drawings illustrating a preferred form of the genus of covermgs corresponding to the invention,

Figure 1 is a longitudinal section through a pipe having ap lied thereto a. covering corresponding to t e invention Fig. 2 is an elevation showing the inner face of one of the sectionsor units;

Figure 3 is a section on the line 3-3, Fig. 2; and

Fig. 4 is a perspective showing one section of the covering in place.

"The pipe or other hot or cold fluid container 1, Fig. 1, may be provided, if desired, with any suitable or known inner covering 2, which may e a laminated or plastic magnesia or magnesia and asbestos split cylinder of standard lengths, having the transverse joints 3 and the longitudinal joints 4, Fig. 4. Although such coverings are effective as, compared with the art which preceded them, they still inevitably leak a considerable stream of hot or cold air, as the case may be, through the joints 3 and 4, re resentin acontinuous convection from t e space tween the covering 2 and the pipe 1 of lost heat. For thorou h insulation it is desirabl to supplement the 13 preferably coinoidenfl with t the su jacent' edge of the sheet 10.

plastic or other covering 2 with a further coating having little or no conducting power and as impervious as practicable to the flow of heated or chilled air from the interstices of the covering 2 and the spaces between the section of the cover 2 and the ipe 1.

The above purposm are elfectivey carried out by the provision of a layer of hair felt or some other mat or hat of aggregated fibrous material containing air in its interstices, butdifficulty has heretofore existed in applying such a layer of fibrous material. So far as I am aware, when previously formed sections of felt or fibrous material have heretofore been provided, it has been necessary to mount them upon a 'iece of paper or like carrier, which in use 1s exterior to the felt proper when it is curved about the pipe. With such arrangement much of the advantage of the fibrous covering is lost through inability} to make a good fit between the edges of the fibrous coat either longitudinally of the pipe or transversely between the sections apphed to the pipe, and through the discontinuity of the exterior coatings. Referring now to Fig. 2, I prefer to prepare the cover sections in preformed sizes, each comprising a quadrilateral, preferably rectangular, waterproof paper, cloth or laminated sheet covering 10. Along one side of this sheet but extending less than its whole length an adhesive 11, such as glue, silicate of soda, or other cement, is spread to a transverse extent preferably of something less than one-fourth of the transverse dimension of the sheet 10, and upon this a rectangular mat 12, of hairfelt, hair and asbestos, or asbestos or hair mixed with any referred textile fiber, is then caused to ad ere with its upper edge e per of the sheet 10, and with one o its rojecting a at 14 slightly bey cipld 0 sheets 10 and 12' are joined together at the adhesion 11, but are free elsewhere, as shown edge dg in Fig. 3.

ference of the surface to be covered, or for one-half of such surface, or any other even divisor of such surface. But this dimensional relation to the place where the o0vering is to be applied is not necessarilyexact, since the covering 12 is compressible in any vdirection longitudinally or transversely of its general extent.

The sections 10-12 of the covering are applied as illustrated in Figs. 1 and 4; starting at the edge 13 which Is placed longitudinally of the pipe, the mat 12 1s first rolled around the pipeuntil its lower edge 17,, Fi 2, contacts with its upper edge 18. The e ge 17 may be sheared away if there is too much material for a particular situation, but awide variation of width can be taken care of by the smooth transverse compression of the free mat 12. The edge 18, if the sections are being installed from left to right, Fig. 1, is compressed against the projecting edge 14 of the last applied section, and the overlap 15 of the sheet 10 is then carried around outside of the last sheet 10, the edge 16 overlapping the part of the sheet 10 to which the mat 12 is fastened by the adhesive 11. If desired, the overlapped edge 16 may be fastened by a suitable adhesive, but the usual procedure is to apply metallic bands 20 of any desired construction to retain the cover sections in place.

It will be observed that wherever the edges of these mats 12 engage each other, the mats 12 are at this oint compressed to close fitting relation. gvhen in place the covering 12 is therefore texturally continuous, having no interstices through which the heated or chilled air surrounding the pipe 1 can escape more readily than at other places in said cover.

I claim:

1. An insulating eoverin section comprising a cover sheet and a. brous mat eonjoined at a place along'a narrow longitudinal area of said parts, the parts being free of other attachment to each other, whereby to permit smooth wrapping on a cylindrical surface of both mat and cover.

2. An insulating covering section comprisin a quadrilateral cover'sheet and a quadrl ateral fibrous mat conjoined at a place along a narrow longitudinal area of said parts, the arts being free of other attachment to eac other, and the fibrous mat bein smaller than the cover, whereby to over ap the mat at two adjacent edges thereo 3. An insulating covering section comprising a quadrilateral waterproof cover sheet and a smaller quadrilateral fibrous mat cemented together near one edge only of the cover, the mat projecting beyond the cover at one edge, and the cover projecting beyond the mat at another edge.

4. An insulating covering section comprising a rectangular cover sheet and a smaller rectangular fibrous mat joined together, the fibrous mat overlapping one edge of the cover, and the cover overlapping two other edges of the fibrous mat, whereby the mat can be rolled into cylindrical form with edges of adjacent sections in compressing contact and covered by one of the overlapping cover edges.

5. An insulating cover section comprising a rectangular waterproof fabric cover sheet and a smaller rectangular hair-felt mat joined together, the fibrous mat overlapping one edge of the cover, and the cover overlapping two other edges of the fibrous mat, W ereby the mat can be rolled into cylindrical form with meeting edges of the same and adjacent sections in com ressing contact and each covered by one of t e overla ping cover edges.

igned b me at New York, N. Y.,' this 19 day of pril, 1919.

JOHN S. CARROLL. 

